Hello,
In section 9.1 Stable Code Points of UAX 15. It is said that "characters with
the Quick_Check=YES property value satisfy conditions 1-3".
Unless I'm completely mistaken this is wrong. For every normal form there is
at least one character with Quick_Check=YES and a canonical combining class
*different* from 0.
Here are examples:
U+030D ccc=230 && nfc_quick_check=YES
U+0301 ccc=230 && nfd_quick_check=YES
U+030D ccc=230 && nfkc_quick_check=YES
U+0301 ccc=230 && nfkd_quick_check=YES
Best,
Daniel